Obtenção e caracterização de não tecidos biodegradáveis
Biodegradable nonwovens based on Polycaprolactone (PCL) and poly (butylene adipate-co-terephtalate) (PBAT) were prepared by solution casting technique in Chloroform. Nonwovens were obtained in the proportions of 20:80, 15:85 and 10:90 polymer and solvent. Non-solvent addition films were also form...
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| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | Dissertação |
| اللغة: | pt_BR |
| منشور في: |
Brasil
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://repositorio.ufrn.br/jspui/handle/123456789/27714 |
| الوسوم: |
إضافة وسم
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| الملخص: | Biodegradable nonwovens based on Polycaprolactone (PCL) and poly (butylene
adipate-co-terephtalate) (PBAT) were prepared by solution casting technique in
Chloroform. Nonwovens were obtained in the proportions of 20:80, 15:85 and 10:90
polymer and solvent. Non-solvent addition films were also formed: distilled water. The
films were characterized by SEM, XRD, FTIR, Wettability, TG and DSC Thermal
Analysis and Steam Permeation. Crystallographic peaks from both polymers were
found and in the solutions containing the non-solvent it was also noted that the peak`s
intensity were low. From FTIR, the bands corresponding to C-H, C=O, CH2 e C-O for
PBAT and C-H, C=O, CH2, C-O, C-C e COC for PCL were identified. From SEM a
dense morphology was visualized for the films obtained only with polymer. There was
no major change in the morphology of the films with the presence of the non-solvent,
in which the addition form and its dissolution time did not cause considerable
modifications in the film morphology. By wettability tests was observed that the nonsolvent has influence on the contact angle. Through Thermal Analysis, it was observed
that the film, after processing, does not have significant traces of the solvent used,
and it is possible to observe that the PCL has a lower thermal stability in relation to the
PBAT. Besides, the addition of distilled water in the films did not cause significant
changes in the thermal characteristics of the material. In relation to water vapor
permeation, it can be said that for hydrophobic polymers, the results were satisfactory.
Therefore, biodegradable nonwoves were obtained and analysed. |
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